Answer:
The answer is D
Step-by-step explanation:
The only logical explanation
It is 30 feet BELOW the platform, so the number is -20 because the platform is 10 feet above ground level.
Her elevation is - 20 because she is 10 feet above ground level, which is 10, and she digs 30 feet down so 10 - 30 is -20.
Hope this helps. :)
Answer:
-2.1
Step-by-step explanation:
each line represents another 0.1, whether adding or subtracting.
after -22. there is one more tick mark, meaning it is -2.1
Answer:
x - y = -1 ....... 1
3x + 2y = 22 ........ 2
Make x the subject in the first equation
x = -1+y
Substitute this into the second equation
3(-1+y) + 2y = 22
-3 + 3y + 2y = 22
5y = 25
Divide both sides by 5
y = 5
Substitute y = 5 into x = -1+y
x = -1+5
x = 4
x = 4 , y = 5
Hope this helps
Step-by-step explanation:
x × x = 49 there are two values for x
1) 7 because 7 × 7 = 49
2) -7 because -7 × -7 = 49 the square value for negative numbers is positive.